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Anaerobic Biohythane Production in an Internal Two-Stage Bioreactor: Kitchen Waste Concentration Optimization

Author

Listed:
  • Peer Mohamed Abdul

    (Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor Darul Ehsan, Malaysia
    Research Centre for Sustainable Process Technology, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor Darul Ehsan, Malaysia)

  • Chyi-How Lay

    (Green Energy and Biotechnology Industry Research Center, Feng Chia University, Taichung 40724, Taiwan)

  • Chiu-Yue Lin

    (Department of Environmental Engineering and Science, Feng Chia University, Taichung 40724, Taiwan)

  • Tan-Phat Vo

    (Master’s Program of Green Energy Science and Technology, Feng Chia University, Taichung 40724, Taiwan)

  • Chia-Min Chang

    (Department of Environmental Engineering and Science, Feng Chia University, Taichung 40724, Taiwan)

Abstract

An internal two-stage bioreactor constructed with a hydrogen chamber and a methane chamber with a working volume of 300 mL and 4700 mL, respectively, was operated using various kitchen waste (KW) concentrations from 10 to 80 g COD/L with a hydraulic retention time of 2 days to characterize the biomethane production performance. The results showed that daily biohythane production exhibited a similar increasing trend at KW concentrations of 10 to 40 g COD/L. The peak biomethane production was 2481 mL/day at a KW concentration of 40 g COD/L. The KW concentration could also affect the COD, carbohydrate, lipid, and protein removal efficiencies. These removal efficiencies were somehow dependent on the KW concentration, with two notable KW concentration groups of 10–20 g COD/L and 40–80 g COD/L. After 80 days of cultivation, Firmicutes dominated the hydrogen chamber, and Methanobacteriaceae and Methanomicrobiaceae dominated the methane chamber. This study presents the optimal KW concentration for high biohythane production efficiency in a novel internal two-stage bioreactor and reveals the dominant microorganisms in its microbial community.

Suggested Citation

  • Peer Mohamed Abdul & Chyi-How Lay & Chiu-Yue Lin & Tan-Phat Vo & Chia-Min Chang, 2024. "Anaerobic Biohythane Production in an Internal Two-Stage Bioreactor: Kitchen Waste Concentration Optimization," Energies, MDPI, vol. 18(1), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:18:y:2024:i:1:p:1-:d:1551048
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